GM Service Manual Online
For 1990-2009 cars only

Battery Hydrometer Displays Yellow Dot

Step

Action

Value(s)

Yes

No

    • Always shield your eyes.
    • Avoid leaning over the battery whenever possible.
    • Do not expose the battery to open flames or sparks.
    • Do not allow battery acid to contact the eyes or the skin.
        1. Flush any contacted areas with water immediately and thoroughly.
        2. Get medical help.

1

Was the Battery Check performed?

--

Go to Step  2

Refer to Battery Check .

2

Tap the hydrometer lightly on top with the handle of a small screwdriver to dislodge any air bubbles inside the battery.

Is the hydrometer dot still yellow?

--

Go to Step  4

Go to Step  3

3

Does the hydrometer display a green or dark dot?

--

Hydrometer OK

Go to Step  4

4

Replace the battery. Refer to Battery Replacement .

Did you complete the replacement?

--

Go to Step  5

--

5

Visually inspect the hydrometer in the new battery.

Does the hydrometer display a green dot?

--

Go to Step  11

Go to Step  6

6

Does the hydrometer display a yellow dot?

--

Go to Step  7

Go to Step  9

7

Tap the hydrometer lightly on top with the handle of a small screwdriver to dislodge any air bubbles inside the battery.

Is the hydrometer dot still yellow?

--

Go to Step  4

Go to Step  8

8

Does the hydrometer display a green dot?

--

Go to Step  11

Go to Step  9

9

Does the hydrometer display a dark dot?

--

Go to Step  10

--

10

Charge the battery. Refer to Battery Charging

Was the battery recharged?

--

Go to Step  11

--

11

Check the charging system for proper operation. Refer to Charging System Check .

Is the charging system OK?

--

Hydrometer OK

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